Engineering Board Exam Reviewer · Angles and Angle Measurement · medium

Assuming the earth is a sphere of radius 6400 km, find the distance along a 4° arc at the equator.

  1. 446.86 km
  2. 335.10 km
  3. 402.12 km
  4. 480.23 km

Answer

A. 446.86 km

Solution

s=r =6400≤ft(4×π/180 )=6400(0.06981) 446.86 km.

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